The polar vortex is a large area of cold, spinning air that sits near the North Pole and exists year-round. When it weakens or shifts, Arctic air can spill south, increasing the risk of snow and ...

The weather forecast is looking promising for warmer weather as the calendar turns to March. In the East, a dramatic warm-up is in the forecast, and the Climate Prediction Center's outlook for March 6 ...

The tropical Pacific Ocean and the frozen expanse of Antarctica sit more than 10,000 kilometers apart. Yet new research shows ...

Behind the disruption lies a powerful atmospheric force that shapes how Arctic cold escapes south. The BBC reports that more than 160 million Americans are expected to be affected by the current ...

Add Yahoo as a preferred source to see more of our stories on Google. This winter’s harsh run is intensifying, with some of the coldest air so far this season plunging into New Hampshire this weekend ...

A polar vortex split is expected to bring frigid Arctic air to the Great Lakes and Northeast later this month. Temperatures could drop 15 to 25 degrees below normal, with single-digit lows possible in ...

Global climate models capture many of the processes that shape Earth's weather and climate. Based on physics, chemistry, fluid motion and observed data, hundreds of these models agree that more carbon ...

Welcome to the Frozen Apple. Temperatures in New York City have remained below freezing since Friday — and they’re expected to stay that way until at least early next week as arctic air has settled ...